intercellular fluid

I am searching for methods for the preparation of intercellular fluid
(IF) from Arabidopsis leaf. I would be grateful if anybody could
provide the protocols for IF preparation. Thank you in advance.
June M. Kwak
Dept. of Life Science
POSTECH
Pohang 790-784, Kyungbuk
Korea
e-mail: jmkwak at life.postech.ac.kr